Rosa plant named ‘RUIRD0037A’

ABSTRACT

A new and distinct hybrid  Rosa  cultivar named ‘RUIRD0037A’ is disclosed, characterized by large, yellow flowers with a sweet fragrance. Plants are upright, and exhibit good resistance to blackspot diseases. The new variety is a  Rosa , normally produced as an outdoor garden or container plant.

Latin name of the genus and species: Rosa hybrida.

Variety denomination: ‘RUIRD0037A’.

BACKGROUND OF THE INVENTION

The new Rosa cultivar is a product of a planned breeding program conducted by the inventor. The objective of the breeding program was to produce improved rose varieties. The cross resulting in this new variety was made during Spring of 2003, by the inventor at a research nursery in Hazerswoude, The Netherlands.

The seed parent is the unpatented variety Rosa ‘DELdog’. The pollen parent is the unpatented Rosa ‘TANanaistrua’. The new variety was selected in June 2004 by the inventor at the same research nursery in Hazerswoude, The Netherlands. The inventor continued observing characteristics of the new variety for several years, in the controlled conditions of the research nursery.

Asexual reproduction of the new cultivar was performed by vegetative softwood cuttings. This was first performed at a greenhouse in Hazerswoude, The Netherlands, in August 2004, and has shown that the unique features of this cultivar are stable and reproduced true to type in successive generations.

SUMMARY OF THE INVENTION

The cultivar ‘RUIRD0037A’ has not been observed under all possible environmental conditions. The phenotype may vary somewhat with variations in environment such as temperature, day length, and light intensity, without, however, any variance in genotype.

The following traits have been repeatedly observed and are determined to be the unique characteristics of ‘RUIRD0037A’ These characteristics in combination distinguish ‘RUIRD0037A’ as a new and distinct Rosa cultivar:

-   -   1. Good fragrance.     -   2. Large yellow flowers.

PARENTAL COMPARISON

Plants of the new cultivar ‘RUIRD0037A’ are similar to plants of the seed parent, in most horticultural characteristics, however, plants of the new cultivar ‘RUIRD0037A’ differ in the following:

-   -   1. The new variety has darker yellow flowers, while the seed         parent has lighter yellow flowers.

Plants of the new cultivar ‘RUIRD0037A’ are similar to plants of the pollen parent in most horticultural characteristics, however, plants of the new cultivar ‘RUIRD0037A’ differs in the following;

-   -   1. The new variety has yellow flowers, while the pollen parent         has red flowers.

COMMERCIAL COMPARISON

Plants of the new cultivar ‘RUIRD0037A’ can be compared to the commercial variety Rosa ‘Chewhocan’, U.S. Plant Pat. No. 26,914. These varieties are similar in most horticultural characteristics, however ‘RUIRD0037A’ differs in the following:

-   -   1. This new cultivar has single flowers; this comparator has         double flowers.     -   2. Anthers and pollen of new variety are more orange; comparator         has lighter yellow anthers and pollen.     -   3. The new variety has larger flowers than this comparator.

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

The accompanying photograph in FIG. 1 illustrates in full color a typical plant of ‘RUIRD0037A’ in a 2 gallon container grown in Grand Haven, Mich. in a polyhouse. Plants in FIG. 1 are approximately 2 to 3 years old.

FIG. 2 illustrates a close up view of a flower.

The photographs were taken using conventional techniques and although colors may appear different from actual colors due to light reflectance it is as accurate as possible by conventional photographic techniques.

DETAILED BOTANICAL DESCRIPTION

In the following description, color references are made to The Royal Horticultural Society Colour Chart 2007 except where general terms of ordinary dictionary significance are used. The following observations and measurements describe ‘RUIRD0037A’ plants grown outdoors, in Hazerswoude, the Netherlands. The growing temperature ranged from approximately 10° C. to 38° C. during the day and from approximately 5° C. to 22° C. during the night. Measurements were taken in September. General light conditions were very bright, normal sunlight. Measurements and numerical values represent averages of typical plant types.

-   Botanical classification: Rosa ‘RUIRD0037A’. -   Market classification: Floribunda garden rose.

PROPAGATION

-   Time to initiate roots: 30 days at approximately 20° C. -   Time to produce a rooted cutting: 120 days at approximately 20° C. -   Root description: Fibrous and fleshy, medium thickness, moderately     branched, dense. White in color, not accurately measured with R.H.S.     chart.

PLANT

-   Age of plant described: 2-3 years. -   Growth habit: Upright. -   Container size: 1, 2, 3, 5 gallon pots. -   Height: 67 cm. -   Plant spread: 80 cm. -   Rootstock: Own root. -   Growth rate: Moderate. -   Branching habit: Mostly horizontally outwards, arching. -   Length of primary lateral branches: 27 cm.     -   -   Diameter of lateral branches: 4 mm. -   Quantity lateral branches: 10. -   Internode length: 2-4 cm. -   Stem:     -   -   Appearance.—Upright.         -   Aspect.—45-90 degrees.         -   Strength.—Strong.         -   Color.—RHS Yellow-Green 146C.         -   Pubescence.—None. -   Thorns:     -   -   Number per linear centimeter.—2.         -   Shape.—Narrow deltoid, bent downward.         -   Apex.—Acuminate.         -   Height.—5 mm.         -   Color.—Immature: RHS Greyed-Red 180A. Mature: RHS Greyed-Red             181A.

FOLIAGE

-   Leaf:     -   -   Arrangement.—Alternate.         -   Quantity.—Average 9 per lateral branch.         -   Average length.—5-12 cm.         -   Average width.—8-9 cm. -   Leaflet:     -   -   Quantity.—5 to 7 per leaf.         -   Terminal length.—5.75 cm.         -   Terminal width.—2.75 cm.         -   Lateral length.—4 cm.         -   Lateral width.—2.5 cm.         -   Shape.—Elliptic.         -   Apex.—Acute.         -   Base.—Attenuate.         -   Margin.—Serrate.         -   Pubescence.—None.         -   Texture.—Smooth, glossy.         -   Color.—Young foliage upper side: RHS Green 138A. Young             foliage under side: RHS Greyed-Red 181B. Mature foliage             upper side: RHS Green 139A. Mature foliage under side: RHS             Yellow Green 146B flushed Greyed-Red 181B.         -   Venation.—Pattern: Pinnate. Color, upper side.. RHS             Greyed-Orange 163B. Color, mature, under side: RHS             Greyed-Orange 167C. Color, immature, under side: RHS             Greyed-Red 181C. -   Petiole:     -   -   Leaf petiole length.—2 cm.         -   Leaf petiole diameter.—3 mm.         -   Leaflet petiole length.—2 mm.         -   Leaflet petiole diameter.—1 mm.         -   Leaf petiole texture.—Micro-thorns.         -   Leaflet petiole texture.—Smooth, waxy.         -   Leaf petiole color, upper surface.—RHS Greyed-Red 179C.         -   Leaf petiole color, lower surface.—RHS Yellow-Green 144B.         -   Leaflet petiole color, upper surface.—RHS Yellow-Green 144C             flushed Greyed-Red 179A.         -   Leaflet petiole color, lower surface.—RHS Greyed-Red 179C. -   Stipule:     -   -   Quantity.—2.         -   Shape.—Falcate.         -   Apex.—Acuminate.         -   Base.—Truncate.         -   Margin.—Fused with petiole, ciliate.         -   Length.—1-2 cm.         -   Width.—4 cm.         -   Texture, upper surface.—Smooth.         -   Texture, lower surface.—Smooth.         -   Color, upper surface.—RHS Green 137D.         -   Color, lower surface.—RHS Green 137D.

FLOWER

-   Natural flowering season: Summer. -   Flower type and habit: Single rotate. -   Quantity of flowers: 1 to 5 per spray. -   Sprays per lateral stem: 1. -   Flower:     -   -   Shape.—Round whorl.         -   Diameter.—7 cm.         -   Height.—3 cm.         -   Aspect.—Outward or upward facing.         -   Persistent or self-cleaning.—Persistent.         -   Fragrance.—Sweet. -   Peduncle:     -   -   Length.—6 cm.         -   Diameter.—2 mm.         -   Angle.—Upright, straight.         -   Strength.—Strong.         -   Texture.—Prickly.         -   Color.—RHS Green 143B. -   Petals:     -   -   Arrangement.—Whorled.         -   Appearance.—Intense, deeply pigmented.         -   Petal quantity.—Average 8.5.         -   Fused.—No.         -   Length.—3 cm.         -   Width.—2.5-3.5 cm.         -   Shape.—Obovate.         -   Margin.—Entire.         -   Apex.—Obocordate.         -   Base.—Obtuse.         -   Texture.—Smooth, silky.         -   Color.—When opening: Upper surface: RHS Yellow-Orange 17C.             Lower surface: RHS Yellow-Orange 17C. Fully opened: Upper             surface: RHS Yellow 7D. Lower surface: RHS Yellow 7D. -   Petaloids: None. -   Bud:     -   -   Shape.—Ovate.         -   Length.—2 cm.         -   Diameter.—1 cm.         -   Color.—RHS Green 143B. -   Sepals:     -   -   Quantity.—5.         -   Arrangement.—Whorled.         -   Length.—1.75 cm.         -   Width.—1 cm.         -   Shape.—Acuminate.         -   Apex.—Acuminate.         -   Base.—Truncate.         -   Margin.—Pubescent.         -   Color.—Immature, Upper Side: RHS Green 142D. Immature, Under             Side: RHS Green 143B. Mature, Upper Side: RHS Green 142D.             Mature, Under Side: RHS Green 143B.         -   Texture.—Upper: Pubescent. Lower: Smooth with bumps. -   Peduncle:     -   -   Length.—6 cm.         -   Diameter.—2 mm.         -   Angle.—Upright.         -   Strength.—Strong.         -   Texture.—Prickly.         -   Color.—RHS Green 143B. -   Receptacle:     -   -   Length.—1 cm.         -   Width.—1.2 cm.         -   Shape.—Obovate.         -   Texture.—Smooth.         -   Color.—RHS Green 143B.

REPRODUCTIVE ORGANS

-   Stamens:     -   -   Quantity.—Average 100.         -   Filament length.—Average 1 cm.         -   Filament color.—RHS Yellow 6A. -   Anthers:     -   -   Length.—2 mm.         -   Shape.—Club-like.         -   Color.—RHS Yellow-Orange 22A.         -   Pollen.—Color: RHS Yellow-Orange 22A. Quantity: Moderate. -   Pistil:     -   -   Number.—50.         -   Length.—4 mm. -   Stigma:     -   -   Shape.—Diffuse.         -   Color.—RHS Greyed-Orange N167C. -   Style:     -   -   Length.—5 mm.         -   Color.—RHS Greyed-Yellow 160B.

OTHER CHARACTERISTICS

-   Seeds and fruits: Not observed. -   Disease/pest resistance: Good overall disease resistance to normal     pests and diseases typical of garden roses. Very good resistance to     blackspot diseases. 

What is claimed is:
 1. A new and distinct hybrid cultivar of Rosa plant named ‘RUIRD0037A’ as herein illustrated and described. 